Ribose and deoxyribose are constituents of the nucleic acids RNA and DNA.核糖与脱氧核糖分别是核糖核酸与脱氧核酸(DNA)的结构成分.The sugar in all the nucleotides of DNA is deoxyribose.所有DNA的核苷酸中的糖均是脱氧核糖.Deoxyribose A pentose ( five - carbon ) sug...
他命令他们把几个枕头叠放在自己的背后。He ordered them to stack up pillows behind his back.萨姆舒服地枕着枕头进入了梦乡。Sam snuggled down in his pillow and fell asleep.他把闹钟塞在枕头底下，想减低声音。He tried to muffle the alarm clock by putting it under his pillow....
The roosters were crowing and the dawn was not far off.雄鸡报晓,黎明即将来到.She was crowing with delight.她欢呼雀跃。The cock is crowing.这只公鸡正在啼鸣。Nationalism is a silly cock crowing on its own dunghill.公鸡总是在自己的粪堆上称雄.Joe stumbled along,...
This ruler has one scale in centimeters and another in inches.这把尺有厘米和英寸两种刻度.During that time Pericles was the best - known ruler of Athens.这个时期伯利克利斯是雅典最著名的统治者.The imprecision of the ruler gave him a lot of trouble.尺子的不精确...